1.Itissaidthattheoldchurch_______(build)from1845to1848.
2.There______(notbe)muchraininmyhometownsincethebeginningofthismonth.
3.Themorecarefulyouare,thebetteryou_____(do)inthenextterm.
4.Mikeis14yearsold.Davidis12yearsold.(合并为一句)
Mikeis2years___________David.
请说明理由!